The polarizing light microscope (PLM) (Leica DMR-XP
shown above) is the microscopist’s main tool for particle
identification. Using plain and crossed polarized light, a
microscopist can characterize the optical properties of crystalline
material, which along with morphology and color can lead to their
identification. The polarized light microscope has a variety of
objectives that result in magnifications from 25-630 times with
minimal sample preparation.